[alsa-devel] [PATCH 0/2] ALSA: pcm: Fix race condition in runtime access

Since - snd_pcm_detach_substream sets runtime to null without stream lock and - snd_pcm_period_elapsed checks the nullity of the runtime outside of stream lock.

This will trigger null memory access in snd_pcm_running() call in snd_pcm_period_elapsed.

paulhsia (2): ALSA: pcm: Fix stream lock usage in snd_pcm_period_elapsed() ALSA: pcm: Use stream lock in snd_pcm_detach_substream()

sound/core/pcm.c | 8 +++++++- sound/core/pcm_lib.c | 8 ++++++-- 2 files changed, 13 insertions(+), 3 deletions(-)